CN114950065B - Waste gas concentration adjusting device - Google Patents
Waste gas concentration adjusting device Download PDFInfo
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- CN114950065B CN114950065B CN202210669729.2A CN202210669729A CN114950065B CN 114950065 B CN114950065 B CN 114950065B CN 202210669729 A CN202210669729 A CN 202210669729A CN 114950065 B CN114950065 B CN 114950065B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses an exhaust gas concentration adjusting device, comprising: a housing having an inlet air duct and an outlet air duct; the adsorption body is arranged in the shell and is provided with a first flow passage and a second flow passage which are isolated; the switch valve is used for controlling the exhaust gas to flow into the first flow passage and/or the second flow passage; and the heater is used for heating at least part of the exhaust gas of the second flow passage. The exhaust gas concentration adjusting device can better play a role in peak clipping and valley leveling, can maintain the concentration of organic matters in exhaust gas discharged by the outlet air duct in a relatively stable set interval, has more working modes, and can reduce energy consumption.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a waste gas concentration adjusting device.
Background
In the injection molding field, a large amount of waste gas containing high-concentration organic matters is generated at the moment of mold opening, and the waste gas in other production time only contains low-concentration organic matters, but according to the environment protection requirement, the waste gas containing the organic matters in the whole production process needs to be treated.
In the case of such a scene where the fluctuation of the concentration of the organic matters is large (the concentration may be hundreds of times that of the low concentration), the type selection of the exhaust gas treatment apparatus is difficult, and if the type selection is performed according to the index of the high concentration, the purification requirement of the high concentration can be satisfied, but the configuration is too high for the low concentration exhaust gas generated in other production time, and there is a problem that the apparatus operation is energy-inefficient. If the type is selected according to the low concentration index, the instantaneous high concentration purification requirement cannot be met.
Disclosure of Invention
The invention aims to provide an exhaust gas concentration regulating device which can better play a peak clipping and valley leveling effect, can maintain the concentration of organic matters in exhaust gas discharged from an outlet air duct in a relatively stable set interval, has more working modes and can reduce energy consumption.
In order to solve the above technical problems, the present invention provides an exhaust gas concentration adjusting device, comprising: a housing having an inlet air duct and an outlet air duct; the adsorption body is arranged in the shell and is provided with a first flow passage and a second flow passage which are isolated; the switch valve is used for controlling the exhaust gas to flow into the first flow passage and/or the second flow passage; and the heater is used for heating at least part of the exhaust gas of the second flow passage.
In specific practice, when the concentration of the organic matters in the waste gas generated by the upstream production equipment is high, the waste gas can be selectively introduced into the first flow passage and/or the second flow passage through the switch valve so as to adsorb the organic matters in the waste gas through the adsorbent, thereby reducing the concentration of the organic matters in the waste gas; when the concentration of the organic matters in the upstream production equipment is lower, the heater can be started to heat the whole adsorbent by heating the waste gas entering part of the second flow channels or all the second flow channels, so that the organic matters adsorbed by the adsorbent can be desorbed again, and the concentration of the organic matters in the waste gas can be improved. Therefore, the peak clipping and valley leveling effects can be better achieved, and the concentration of organic matters in the exhaust gas discharged from the outlet air duct can be maintained in a relatively stable set interval.
More importantly, the adsorption body in the embodiment of the invention is provided with the first flow passage and the second flow passage which are isolated, and the arrangement of the two flow passages and the switching valve can provide more operation modes for the waste gas concentration regulating device so as to better adapt to the condition that the concentration of organic matters in waste gas generated by upstream production equipment is complex and changeable.
In the embodiment of the invention, only the exhaust gas entering part or all of the second flow channels is heated, and the exhaust gas entering the first flow channels is not heated. Thus, when the exhaust gas is simultaneously introduced into the two flow channels, the amount of the exhaust gas to be heated can be relatively small, the pressure of the heater can be reduced, and the energy consumption can be reduced.
Optionally, in the direction of extension of the first flow channel, the adsorbent comprises several sections; the air conditioner further comprises a transfer air duct, and the second flow passages of the subsections are communicated through the transfer air duct.
Optionally, the first flow channel forms a first flow path, the second flow channel of each subsection and the switching air duct form a second flow path in combination, and the flow resistance of the second flow path is larger than that of the first flow path.
Optionally, the number of the switching air channels is more than two, and at least one switching air channel is internally provided with the heater.
Optionally, the number of the sections is more than three, and the second flow passages of two adjacent sections are connected through the switching air duct.
Optionally, the air conditioner further comprises a cover body, wherein the cover body is covered on one side of two adjacent branches in the extending direction of the second flow channel, and the cover body and the two adjacent branches are enclosed to form the switching air duct.
Optionally, a first air channel and a second air channel are formed in the shell, the first air channel and the second air channel are respectively located at two sides of the first flow channel, the first air channel and the second air channel are both communicated with the first flow channel, and the second air channel can be communicated with the outlet air channel; the switch valve is used for controlling the communication state of the first air channel and the inlet air channel.
Optionally, a third air channel and a fourth air channel are further formed in the shell, the third air channel and the fourth air channel are respectively located at two sides of the extending direction of the second flow channel, the third air channel and the fourth air channel are both communicated with the second flow channel, and the fourth air channel is communicated with the outlet air channel; the switch valve is also used for controlling the communication state of the third air channel and the inlet air channel.
Optionally, the second air duct is communicated with the fourth air duct.
Optionally, the switch valve is further configured to control a communication state of the second air duct and the inlet air duct, a communication state of the second air duct and the outlet air duct, and a communication state of the first air duct and the outlet air duct; when the second air channel is communicated with the inlet air channel, the second air channel is isolated from the outlet air channel, the first air channel is isolated from the inlet air channel, and the first air channel is communicated with the outlet air channel.
Optionally, the first air channel is communicated with the outlet air channel through the fourth air channel, and the second air channel is communicated with the inlet air channel through the third air channel.
Optionally, the switching valve includes a first poppet and a second poppet; the first lifting valve comprises a first valve rod and a first valve plate which are connected, the first valve plate is arranged in the first air duct, and the first valve plate is provided with a first working position and a second working position; when the first working position is adopted, the first air channel is communicated with the inlet air channel, and the first air channel is isolated from the fourth air channel; when the first working position is in the second working position, the first air channel is isolated from the inlet air channel, and the first air channel is communicated with the fourth air channel; the second lifting valve comprises a second valve rod and a second valve plate which are connected, the second valve plate is arranged in the second air duct, and the second valve plate is provided with a third working position and a fourth working position; in the third working position, the second air channel is communicated with the third air channel, and the second air channel is isolated from the outlet air channel; and in the fourth working position, the second air channel is isolated from the third air channel, and the second air channel is communicated with the outlet air channel.
Optionally, the switch valve further comprises an air valve, and the air valve is used for controlling the communication state of the third air channel and the inlet air channel.
Optionally, the adsorbent includes a plurality of base plates that the interval set up, and is adjacent two be formed with the adsorption space between the base plate, and adjacent two be provided with the reposition of redundant personnel between the base plate, be used for in the adsorption space separate first runner with the second runner.
Optionally, one of the two adjacent adsorption spaces is formed with the first flow channel, and the other is formed with the second flow channel.
Optionally, the diverter is corrugated board, pipe fitting or board piece that is set up with the base plate in the contained angle.
Optionally, the shunt is adhesively secured to the substrate.
Optionally, the material of the shunt and the substrate is organic adsorption material.
Optionally, the extending direction of the first flow channel and the extending direction of the second flow channel form an included angle.
Drawings
FIG. 1 is a graph showing the concentration of organic matter in exhaust gas and time in a specific scenario in the prior art;
FIG. 2 is a graph showing the change of concentration and time of organic matters in exhaust gas after being treated by the exhaust gas concentration adjusting device provided by the invention;
FIG. 3 is a schematic view showing the structure of an embodiment of an exhaust gas concentration adjusting device according to the present invention;
FIG. 4 is a flow chart of exhaust gas of FIG. 3 with the first valve plate in a first operating position and the damper closed;
FIG. 5 is a flow chart of exhaust gas of FIG. 3 with the first valve plate in the second operating position and the damper open;
FIG. 6 is a flow chart of exhaust gas of FIG. 3 with the first valve plate in a first operating position and the damper open;
FIG. 7 is a schematic view showing the structure of another embodiment of the exhaust gas concentration adjusting apparatus according to the present invention;
FIG. 8 is a flow chart of the exhaust gas of FIG. 7 with the first valve plate in the second operating position, the damper open, and the second valve plate in the third operating position;
FIG. 9 is a schematic diagram of one embodiment of a subsection;
FIG. 10 is a diagram showing the connection structure of the base plate and the shunt in FIG. 9;
FIG. 11 is a schematic diagram of another embodiment of a subsection.
The reference numerals in fig. 3 to 11 are explained as follows:
1 a shell, 11 an inlet air channel, 12 an outlet air channel, 13 a first air channel, 14 a second air channel, 15 a third air channel and 16 a fourth air channel;
2 adsorbers, 21 branches, 211 substrates, 212 shunts, 2a first flow channels, 2b second flow channels;
3 a heater;
4a cover body and 4a switching air duct;
5 first poppet valve, 51 first valve stem, 52 first valve plate;
6 a second poppet valve, 61 a second valve stem, 62 a second valve plate;
and 7, an air valve.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The term "plurality" as used herein refers to a plurality, typically two or more, of indefinite quantities; and when "a number" is used to denote the number of a certain number of components, the number of components is not necessarily related to each other.
The terms "first," "second," and the like, herein are merely used for convenience in describing two or more structures or components that are identical or functionally similar, and do not denote any particular limitation of order and/or importance.
Referring to fig. 1 and 2, fig. 1 is a graph showing a change in concentration and time of an organic matter in an exhaust gas in a specific scenario in the prior art, and fig. 2 is a graph showing a change in concentration and time of an organic matter in an exhaust gas after being treated by the exhaust gas concentration adjusting device according to the present invention.
In the mold opening link in the injection molding field, the respiration link of a chemical raw material tank in the chemical industry and the loading and unloading link, the concentration of organic matters in the generated waste gas can be greatly increased, and the concentration of organic matters in other links can be relatively lower, so that the fluctuation of the concentration of the organic matters in the waste gas is larger in the whole production process, and particularly, the method can be seen in fig. 1, and further, great difficulty is brought to the type selection of waste gas treatment equipment.
In view of this, an embodiment of the present invention provides an exhaust gas concentration adjustment device, which is disposed between a production apparatus and an exhaust gas treatment apparatus, and is configured to peak-cut and average the concentration of organic matters in exhaust gas, so that the concentration of organic matters in exhaust gas received by a downstream exhaust gas treatment apparatus can be maintained substantially within a relatively stable set interval, as shown in fig. 2, so that the exhaust gas treatment apparatus can be conveniently selected, over-design of the exhaust gas treatment apparatus can be avoided, and effective treatment of organic matters in exhaust gas can be ensured.
It should be noted that, the embodiment of the present invention is not limited to the specific range of the set section, and in practical application, those skilled in the art may consider the specific information of the production apparatus and the multiple factors such as the type of the exhaust gas treatment apparatus.
Referring to fig. 3-11, fig. 3 is a schematic structural view of an embodiment of the exhaust gas concentration adjusting device according to the present invention, fig. 4 is a schematic structural view of exhaust gas when the first valve plate is in the first working position and the air valve is closed, fig. 5 is a schematic structural view of exhaust gas when the first valve plate is in the second working position and the air valve is open, fig. 6 is a schematic structural view of exhaust gas when the first valve plate is in the first working position and the air valve is open, fig. 7 is a schematic structural view of another embodiment of the exhaust gas concentration adjusting device according to the present invention, fig. 8 is a schematic structural view of exhaust gas when the first valve plate is in the second working position and the air valve is open and the second valve plate is in the third working position, fig. 9 is a schematic structural view of one embodiment of the subsection, fig. 10 is a connecting structure diagram of the base plate and the splitter in fig. 9, and fig. 11 is a schematic structural view of another embodiment of the subsection.
As shown in fig. 3 to 6, the present invention provides an exhaust gas concentration adjusting apparatus including a housing 1, an adsorbent 2, an on-off valve, and a heater 3.
Wherein the shell 1 is provided with an inlet air duct 11 and an outlet air duct 12, and the inlet air duct 11 is used for being connected with an exhaust gas discharge port of upstream production equipment so as to introduce exhaust gas generated by the production equipment; the outlet duct 12 is connected to an exhaust gas inlet of a downstream exhaust gas treatment device to introduce the exhaust gas treated by the exhaust gas concentration adjusting device provided by the present invention into the exhaust gas treatment device. The adsorbent 2 is disposed in the housing 1, and the adsorbent 2 has a first flow passage 2a and a second flow passage 2b that are isolated from each other, and the adsorbent 2 can adsorb organic substances in the exhaust gas when the exhaust gas flows in the first flow passage 2a and the second flow passage 2b. The on-off valve is used to control the flow direction of the exhaust gas so that the exhaust gas can selectively flow into the first flow passage 2a and/or the second flow passage 2b. The heater 3 is used for heating part of the second flow passage 2b or all the exhaust gas in the second flow passage 2b, so as to heat the adsorbent 2 for desorption of the organic matters adsorbed by the adsorbent 2.
In specific practice, when the concentration of the organic matters in the exhaust gas generated by the upstream production equipment is high, the exhaust gas can be selectively introduced into the first flow passage 2a and/or the second flow passage 2b through the switching valve so as to adsorb the organic matters in the exhaust gas through the adsorbent 2, thereby reducing the concentration of the organic matters in the exhaust gas; when the concentration of the organic matters in the upstream production equipment is low, the heater 3 can be started to heat the whole adsorbent 2 by heating the exhaust gas entering part of the second flow passages 2b or all the second flow passages 2b, so that the organic matters adsorbed by the adsorbent 2 can be desorbed again, and the concentration of the organic matters in the exhaust gas can be increased. Thus, the peak-clipping and valley-leveling effects can be achieved well, and the concentration of organic matters in the exhaust gas discharged from the outlet duct 12 can be maintained within a relatively stable set interval.
More importantly, the adsorption body 2 in the embodiment of the invention is provided with the first flow passage 2a and the second flow passage 2b which are isolated, and the arrangement of the two flow passages and the on-off valve can provide more operation modes for the waste gas concentration regulating device so as to better adapt to the complex and changeable concentration of organic matters in waste gas generated by upstream production equipment.
In the embodiment of the present invention, only the exhaust gas entering part or all of the second flow passages 2b is heated, and the exhaust gas entering the first flow passages 2a is not heated. In this way, when the exhaust gas is simultaneously introduced into the two flow passages, the amount of exhaust gas to be heated can be relatively small, and the pressure of the heater 3 can be reduced, and the energy consumption can be reduced.
The material of the adsorbent 2 is not limited in this embodiment, and in specific practice, a person skilled in the art may design the adsorbent according to actual needs, so long as the technical purpose of adsorbing the organic matters can be satisfied.
At least part of the adsorbent 2 may be made of an organic adsorbent material, and the kind of the organic adsorbent material is not limited. For example, the organic material may be a fibrous material having an adsorption function, such as activated carbon fibers; or, the organic matter adsorbing material can also adopt inorganic fibers such as ceramic fibers, glass fibers and the like as a load and be matched with activated carbon, molecular sieves or other organic matter adsorbing materials to form a whole; alternatively, the organic material may be a ceramic material containing activated carbon, molecular sieve, or other organic material.
In addition, the embodiment of the present invention is not limited to the structural form of the adsorbent 2, and the number of the first flow passages 2a and the second flow passages 2b, the shape of the cross section (the cross section perpendicular to the extending direction), the flow area, and the like, and in specific practice, those skilled in the art can design according to actual needs as long as they can meet the actual use requirements.
In a specific scheme, referring to fig. 9 to 11, the adsorbent 2 may include a plurality of substrates 211 arranged at intervals, an adsorption space may be formed between two adjacent substrates 211, and a splitter 212 may be disposed between two adjacent substrates 211 to separate the first flow channel 2a and the second flow channel 2b in the adsorption space. Only one of the substrate 211 and the shunt 212 may be made of an organic material, or both may be made of an organic material.
The shunt 212 and the substrate 211 may be manufactured separately and then assembled. In this embodiment, the connection manner between the splitter 212 and the substrate 211 may be varied, so long as a reliable connection therebetween can be ensured. For example, the shunt 212 and the substrate 211 may be fixed by bonding, locking screws, welding, clamping, or the like. In the case of adhesive fixation, the kind of the adhesive may be not limited.
In fact, the splitter 212 and the base 211 may be integrally formed as a single piece. For example, the adsorbent 2 formed by combining the splitter 212 with the substrate 211 may be directly obtained by a 3D printing technique, so that the acquisition of the adsorbent 2 may be relatively simple.
It will be appreciated that the configuration and arrangement of the flow splitter 212 directly determines the cross-sectional shape of the first and second flow channels 2a, 2 b.
In the embodiment of fig. 9 and 10, the flow splitter 212 may be a corrugated plate, and the first flow path 2 a/second flow path 2b may be formed to have a substantially triangular cross-sectional shape. Alternatively, the dividing member 212 may be a plate member disposed at an angle with respect to the substrate 211, and in this case, the cross-sectional shape of the first flow channel 2 a/the second flow channel 2b may take various shapes such as triangle, rectangle, parallelogram, trapezoid, diamond, etc. depending on the arrangement of the dividing member 212.
In the embodiment of fig. 11, the shunt 212 may be a tube in particular. At this time, the first flow path 2 a/second flow path 2b may include a space between the pipe member and the base plate 211, a space between adjacent two pipe members, and the like, in addition to an in-pipe path of the pipe member; it should be noted that, if the space between the pipe and the substrate 211 and the space between the adjacent pipe are already filled with glue or other materials, the first flow channel 2 a/the second flow channel 2b may not include these spaces. The specific shape of the channel in the tube is related to the shape of the tube; in the embodiment of fig. 11, the pipe is a circular pipe, and accordingly, the channel inside the pipe is a circular channel, and in practical use, the pipe may be a triangular pipe, a square pipe, or another special pipe.
It is to be understood that the above description is merely illustrative of the possible cross-sectional shapes of the first flow passage 2 a/second flow passage 2b, but this is not intended to limit the scope of the present invention for the exhaust gas concentration adjustment device, and that the cross-sectional shapes of the first flow passage 2 a/second flow passage 2b may be designed otherwise, provided that the first flow passage 2 a/second flow passage 2b is not affected by the conduction of the exhaust gas.
In some embodiments, the first flow channel 2a and the second flow channel 2b may be located in the same adsorption space, that is, between two adjacent substrates 211, and may form both the first flow channel 2a and the second flow channel 2b.
In other embodiments, the first flow channel 2a and the second flow channel 2b may be located in different adsorption spaces, so that the first flow channel 2a and the second flow channel 2b may be located in different layers, and exhaust gas can be more conveniently delivered into the first flow channel 2a and the second flow channel 2b. In this embodiment, the adsorption space where the first flow channel 2a is provided and the adsorption space where the second flow channel 2b is provided may be adjacent, and this may be seen in fig. 9 to 11, that is, one of the adjacent adsorption spaces may be formed with the first flow channel 2a and the other may be formed with the second flow channel 2b; alternatively, the first flow channel 2 a/the second flow channel 2b may be provided in each of the adjacent layers.
The first flow channel 2a and the second flow channel 2b may be arranged in the same direction, i.e. the direction of extension of the first flow channel 2a and the second flow channel 2b may coincide.
Alternatively, the extending direction of the first flow passage 2a and the extending direction of the second flow passage 2b may be disposed at an angle. In this way, the air channels in the shell 1 communicated with the first flow channel 2a and the air channels in the shell communicated with the second flow channel 2b can be distributed on different sides of the adsorbent 2, so that the arrangement of the air channels is facilitated; in addition, the arrangement of the plurality of flow directions can effectively reduce the adsorption dead angle caused by the factors such as uneven air flow distribution, can more fully utilize the adsorbent 2, and can further improve the adsorption efficiency. In the embodiment shown in the drawings, as shown in fig. 9 and 11, the extending direction of the first flow channel 2a and the extending direction of the second flow channel 2b may be substantially 90 degrees, and in the following embodiments, this will be described by way of example.
For convenience of description, the extending direction of the first flow passage 2a may be referred to as a first direction, and the extending direction of the second flow passage 2b may be referred to as a second direction.
While the exhaust gas flows in the adsorbent 2, it may flow directly from one end to the other end of the first flow passage 2a so as to penetrate the entire adsorbent 2 in the first direction; and, it may flow directly from one end to the other end of the second flow passage 2b so as to penetrate the entire adsorbent 2 in the second direction, in which case the heater 3 needs to be provided on the upstream side of the entire adsorbent 2 in the second direction to heat the entire exhaust gas entering the second flow passage 2 b. In addition to this, the embodiment of the present invention provides another flow scheme that reduces the flow rate of the exhaust gas to the second flow passage 2 b.
In detail, the adsorbent 2 may be divided into several sections 21 in a first direction. The dividing mode can be based on the split design of the adsorbent 2 in the first direction, in this case, the adsorbent 2 is formed by combining a plurality of separately prepared subsections 21, and the dimension of each subsection 21 in the first direction can be relatively smaller, so that the manufacture, the transportation and the installation can be facilitated; in this embodiment, the respective sections 21 may be in close contact with each other in the first direction or may be in clearance fit with each other, but it is necessary to ensure that the first flow passages 2a of the respective sections 21 can communicate with each other. Alternatively, the adsorbent 2 may be still integrally formed in the first direction, and in this case, the adsorbent 2 needs to be divided by a worker in the first direction according to actual situations.
Further, the air duct system may further include a switching air duct 4a, and the second flow channels 2b of the respective sections 21 may be communicated through the switching air duct 4 a. For convenience of description, the first flow path 2a may be referred to as a first flow path, and the path formed by the combination of each second flow path 2b and the transfer duct 4a may be referred to as a second flow path.
By adopting the above-described configuration, the length of the second flow path is substantially equal to the sum of the dimensions of the second flow passages 2b of the respective sections 21 and the dimension of the transfer duct 4a in the air flow direction, and the length of the second flow path is greatly increased, so that the flow resistance of the exhaust gas in the second flow path can be increased. Thus, when the first flow passage 2a and the second flow passage 2b are both capable of conducting the exhaust gas, the amount of the exhaust gas entering the second flow passage 2b can be relatively reduced, and thus the amount of the exhaust gas required to be heated by the heater 3 can be reduced, the burden on the heater 3 can be reduced, and the energy consumption can be reduced.
Still further, the flow resistance of the first flow path may also be set smaller than that of the second flow path so that the amount of exhaust gas entering the second flow path may be smaller than that entering the first flow path. In this way, the amount of exhaust gas that needs to be heated by the heater 3 can be reduced to a greater extent and the energy consumption can be reduced to a greater extent.
Note that the above-described manner of controlling the flow resistance is only one way of achieving a reduction in the intake air amount of the second flow passage 2b, but is not the only way, and in practical applications, the intake air amount of the second flow passage 2b may be controlled by adjusting the opening degree of the on-off valve.
In the embodiment of the present invention, the number of the subsections 21 is not limited, and in specific practice, those skilled in the art can design according to actual needs, as long as the requirements of use can be satisfied. In the embodiment of the drawings, there may be three branches 21, but of course, four or more branches may be present. Since one transfer duct 4a can communicate with the second flow passages 2b of the two sections 21, the number of transfer ducts 4a can be one less than the sections 21.
With reference to fig. 3, for convenience of description, each of the sections 21 may be named: a first section, a second section and a third section. The switching air duct 4a may be a second flow channel 2b connecting two adjacent sections 21, that is, the first section and the second section may be connected by the switching air duct 4a, and the second section and the third section may be connected by the switching air duct 4 a; at this time, the switching air duct 4a does not form a shielding for the inlet and the outlet of the second flow path, and can facilitate air inlet and air outlet. Alternatively, other connection methods may be used for the transfer duct 4a, for example, it is also possible to connect the first and third sections through the transfer duct 4a, and connect the first/third sections through the transfer duct 4a and the second section.
The formation mode of the switching air duct 4a is not limited, and in specific practice, a person skilled in the art can set the switching air duct according to actual needs, so long as the switching air duct can meet the use requirement. In some embodiments, a tube may be configured, where two ends of the tube may be connected to two sections 21, respectively, and the inner cavity of the tube may form the switching air duct 4a described above. In other embodiments, the air conditioner may include a cover body 4, where the cover body 4 may be covered on one side of the two adjacent sections in the extending direction of the second flow channel 2b, so as to form an adapting air duct 4a with the two adjacent sections 21; this embodiment can be seen in fig. 3-8, which are relatively simple in terms of construction and which are less intrusive to the interior space of the housing 1, providing the same volume of the transfer duct 4a.
When the number of the transfer ducts 4a is two or more, only a part of the transfer ducts 4a may be provided with the heater 3. Of course, the heater 3 may be provided in all the transfer ducts 4a. The type of the heater 3 is not limited herein.
In particular practice, the heating power and the number of the heaters 3 may be controlled to avoid the situation that the initial desorption of the heaters 3 is too much, which leads to the abrupt increase of the concentration of the organic matters in the exhaust gas received by the downstream exhaust gas treatment device. In other words, in actual operation, the heating power, the number of turns on, etc. of the heater 3 may be controlled to adjust the desorption efficiency, so that the concentration profile of the organic matter in the exhaust gas received by the downstream exhaust gas treatment device may be substantially as shown in fig. 2, so as to treat the organic matter in the exhaust gas.
With continued reference to fig. 3, a first air duct 13 and a second air duct 14 may be formed in the housing 1, the first air duct 13 and the second air duct 14 may be located on two sides of the first flow channel 2a, the first air duct 13 and the second air duct 14 may be both communicated with the first flow channel 2a, and the second air duct 14 may be communicated with the outlet air duct 12; the aforementioned on-off valve may be used to control the communication state of the first air duct 13 and the inlet air duct 11.
When the first air duct 13 is communicated with the inlet air duct 11, the exhaust gas can flow in the first flow passage 2a of the adsorbent 2 and flow out through the second air duct 14, and the first flow passage 2a in the adsorbent 2 can participate in adsorbing organic matters in the exhaust gas.
Further, a third air duct 15 and a fourth air duct 16 are further formed in the casing 1, the third air duct 15 and the fourth air duct 16 can be respectively located at two sides of the extending direction of the second flow channel 2b, the third air duct 15 and the fourth air duct 16 can be communicated with the second flow channel 2b, and the fourth air duct 16 can be communicated with the outlet air duct 12; the aforementioned on-off valve is also used to control the communication state of the third air duct 15 and the inlet air duct 11.
When the third air duct 15 is communicated with the inlet air duct 11, the exhaust gas can flow in the second flow passage 2b of the adsorbent 2 and flow out through the fourth air duct 16, and the second flow passage 2b in the adsorbent 2 can participate in adsorbing organic matters in the exhaust gas. In this embodiment, when the heater 3 is activated, the entire adsorbent 2 can be heated by the exhaust gas entering all or part of the second flow passage 2b, and desorption of the organic substances can be achieved.
Since both the second air duct 14 and the fourth air duct 16 are in communication with the outlet air duct 12, in particular practice, the second air duct 14 and the fourth air duct 16 may also be directly placed in communication to simplify the air duct design inside the housing 1.
Based on the design, the exhaust gas concentration adjusting device provided by the invention can have three working modes: in the first mode, the first air duct 13 is communicated with the inlet air duct 11, the third air duct 15 is isolated from the inlet air duct 11, and in this embodiment, referring to fig. 4, the waste gas can flow in the first flow channel 2a from left to right, and the adsorbent 2 only participates in the adsorption of organic matters in the waste gas through the first flow channel 2 a; in the second mode, the third air duct 15 is communicated with the inlet air duct 11, the first air duct 13 is isolated from the inlet air duct 11, in this embodiment, referring to fig. 5, waste gas can flow in the second flow duct 2b and the switching air duct 4a, if the heater 3 in the switching air duct 4a is turned on, desorption of organic matters can be realized in the second mode, and if the heater 3 in the switching air duct 4a is not turned on, adsorption of organic matters can be realized in the second mode; in the third mode, the first air duct 13 is communicated with the inlet air duct 11, the third air duct 15 is communicated with the inlet air duct, and in this embodiment, referring to fig. 6, waste gas can flow in the first flow channel 2a, the second flow channel 2b and the switching air duct 4a, if the heater 3 in the switching air duct 4a is turned on, desorption of organic matters can be realized in the third mode, and if the heater 3 in the switching air duct 4a is not turned on, adsorption of organic matters can be realized in the third mode.
The opening timing of the above three modes in specific practice can be controlled by those skilled in the art, and is not particularly limited herein. In an exemplary scenario, with reference to fig. 1, assuming that the concentration of the organic matters in the exhaust gas discharged from a specific upstream production facility is as shown in fig. 1, when the concentration of the organic matters in the exhaust gas is in the I section, the above-mentioned mode one may be started, and the first flow passage 2a in the adsorbent 2 participates in adsorbing the organic matters in the exhaust gas to reduce the concentration of the organic matters in the exhaust gas; then, when the concentration of the organic matters in the exhaust gas is lower in the II zone, the third mode is started, and the heater 3 is started to heat the adsorbent 2 through the exhaust gas in the second flow path, so that desorption of the organic matters is realized, and the exhaust gas flowing in the first flow path 2a can bring out the organic matters adsorbed in the first flow path 2a in the previous link; then, when the exhaust gas is in the section III, the concentration of the organic matters in the exhaust gas is continuously high for a certain period of time, at this time, the second mode can be started, and the heater 3 is turned off to participate in the adsorption of the organic matters in the exhaust gas through the second flow channel 2b, so as to reduce the concentration of the organic matters in the exhaust gas, and it can be understood that the third mode can still be operated in this link, but the heater 3 needs to be turned off, so that the first flow channel 2a and the second flow channel 2b both participate in the adsorption of the organic matters.
Further, the on-off valve may also be used to control the communication state of the second air duct 14 and the inlet air duct 11, the communication state of the second air duct 14 and the outlet air duct 12, the communication state of the first air duct 13 and the inlet air duct 11, and the communication state of the first air duct 13 and the outlet air duct 12.
When the second air duct 14 is communicated with the inlet air duct 11, the first flow channel 2a can also perform air intake through the second air duct 14 so as to adjust the air intake direction of the first flow channel 2 a. It should be noted, however, that in this embodiment, the second air duct 14 needs to be isolated from the outlet air duct 12, so as to avoid that the air inlet of the second air duct 14 is directly discharged from the outlet air duct 12; in addition, the first air duct 13 needs to be isolated from the inlet air duct 11, so as to avoid the situation of bidirectional air inlet of the first flow channel 2 a; in addition, if the first air channel 2a is air-fed from the second air channel 14, the first air channel 13 needs to be used as an air-out air channel, and at this time, the first air channel 13 is also communicated with the outlet air channel 12, so as to ensure that the first air channel 13 can be used as the air-out air channel of the first air channel 2 a.
The communication between the first air duct 13 and the outlet air duct 12 may be established by a separate air duct or may be indirect by means of a fourth air duct 16 in order to simplify the air duct design. Likewise, the communication between the second air duct 14 and the inlet air duct 11 may be established by a separate air duct, or may be indirect by means of a third air duct 15, in order to simplify the design of the air duct.
Taking the example that the first air duct 13 can be communicated with or isolated from the inlet air duct 11 and the fourth air duct 16, and the second air duct 14 can be communicated with or isolated from the third air duct 15 and the outlet air duct 12, the switch valve may include four valve components, and the four valve components may be respectively disposed at the communication position of the first air duct 13 and the inlet air duct 11, the communication position of the first air duct 13 and the fourth air duct 16, the communication position of the second air duct 14 and the third air duct 15, and the communication position of the second air duct 14 and the outlet air duct 12, so as to control the communication state of the four communication positions.
Alternatively, in the embodiment of fig. 7, the switching valve may include a first poppet 5 and a second poppet 6. The first poppet valve 5 may include a first valve stem 51, a first valve plate 52, and a first driving member 53, where the first driving member 53 may be connected to the first valve plate 52 through the first valve stem 51, and the first valve plate 52 is disposed in the first air duct 13, and under the action of the first driving member, the position of the first valve plate 52 may be changed, so that the first working position and the second working position may be switched; in the first working position, the first air duct 13 is communicated with the inlet air duct 11, and the first air duct 13 is isolated from the fourth air duct 16; in the second working position, the first air duct 13 is isolated from the inlet air duct 11, and the first air duct 13 is communicated with the fourth air duct 16. Likewise, the second poppet valve 6 may include a second valve rod 61, a second valve plate 62, and a second driving member 63, where the second driving member 63 may be connected to the second valve plate 62 through the second valve rod 61, and the second valve plate 62 is disposed in the second air duct 14, and under the action of the second driving member 63, the position of the second valve plate 62 may be changed, so that the second valve plate may be switched between the third working position and the fourth working position; in the third working position, the second air duct 14 is communicated with the third air duct 15, and the second air duct 14 is isolated from the outlet air duct 12; in the fourth operating position, the second air duct 14 is isolated from the third air duct 15, and the second air duct 14 is communicated with the outlet air duct 12.
By means of the arrangement, communication or isolation of two positions can be achieved through one valve component, the number of the valve components can be reduced, the structure can be simplified, and control is facilitated.
Here, the embodiment of the present invention is not limited to the kinds of the first driving member 53 and the second driving member 63, and in specific practice, those skilled in the art can set according to actual needs.
It will be appreciated that the form of movement required by the first and second drive rods 51, 61 is linear displacement, and therefore the first and second drive members 53, 63 need only be capable of providing linear displacement. On the basis of this, the first driver 53/second driver 63 may be a driver capable of directly generating linear displacement using a linear cylinder, an oil cylinder, or the like, and in this case, the first driver 51 and the second driver 61 may be piston rods of these drivers; alternatively, the first driving element 53 and the second driving element 63 may include driving elements such as a revolving cylinder and a motor capable of directly generating rotational displacement, and in this case, a displacement conversion mechanism such as a rack-and-pinion mechanism and a screw mechanism may be required to convert the rotational displacement into a desired linear displacement.
As for the communication state between the third air duct 15 and the inlet air duct 11, it is possible to control by the damper 7. Since the second air duct 14 communicates with the inlet air duct 11 via the third air duct 15, the air valve 7 needs to be opened when the second valve plate 62 is in the third working position to ensure the second air duct 14 communicates with the inlet air duct 11.
Based on the exhaust gas concentration adjusting device provided in fig. 7, on the basis of the three original working modes, one working mode can be further added: mode four, the first valve plate 52 is in the second working position, the second valve plate 62 is in the third working position, the air valve 7 is in the open state, this embodiment can be seen in fig. 8, at this time, the third air duct 15 and the second air duct 14 can be both communicated with the inlet air duct 11, the first air duct 13 and the fourth air duct 16 are communicated, and the exhaust gas can flow in the first flow channel 2a and the second flow channel 2 b; unlike the third mode described above, the flow direction of the exhaust gas in the first flow passage 2a is different.
Still referring to fig. 1, if the aforementioned mode one is performed in the I section, the exhaust gas flows from left to right in the first flow passage 2a (referring to fig. 4). Then, the fourth mode may be executed in the following interval II, and the heater 3 is turned on, and at this time, the flow direction of the exhaust gas in the first flow channel 2a may be from right to left (in conjunction with fig. 8), so that the flow direction of the exhaust gas in the first flow channel 2a during the adsorption of the organic matters is opposite to the flow direction of the exhaust gas in the desorption of the organic matters, which is more beneficial to ensuring the completeness of the desorption of the organic matters.
Referring again to fig. 8, it can be seen that the first heater 3 in the second flow path is actually located downstream of the first section, that is, the exhaust gas entering the second flow channel 2b of the first section is not heated, and thus the first section is not heated, and the exhaust gas entering the first flow channel 2a of the first section may desorb the organic matter adsorbed in the first flow channel 2a depending on the concentration difference of the organic matter.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (16)
1. An exhaust gas concentration adjusting apparatus, characterized by comprising:
a housing (1), the housing (1) having an inlet air duct (11) and an outlet air duct (12);
an adsorbent (2), the adsorbent (2) being disposed within the housing (1), and the adsorbent (2) having a first flow passage (2 a) and a second flow passage (2 b) that are isolated;
a switching valve for controlling the flow of the exhaust gas into the first flow passage (2 a) and/or the second flow passage (2 b);
A heater (3) for heating at least part of the exhaust gas of the second flow passage (2 b);
a first air channel (13) and a second air channel (14) are formed in the shell (1), the first air channel (13) and the second air channel (14) are respectively positioned at two sides of the first flow channel (2 a), the first air channel (13) and the second air channel (14) are communicated with the first flow channel (2 a), and the second air channel (14) can be communicated with the outlet air channel (12); the switch valve comprises a valve component for controlling the communication state of the first air channel (13) and the inlet air channel (11);
a third air duct (15) and a fourth air duct (16) are further formed in the shell (1), the third air duct (15) and the fourth air duct (16) are respectively positioned at two sides of the extending direction of the second flow channel (2 b), the third air duct (15) and the fourth air duct (16) are communicated with the second flow channel (2 b), and the fourth air duct (16) is communicated with the outlet air duct (12); the switch valve further comprises an air valve (7), and the air valve (7) is used for controlling the communication state of the third air duct (15) and the inlet air duct (11).
2. An exhaust gas concentration regulating device according to claim 1, characterized in that the adsorber (2) comprises several branches (21) in the direction of extension of the first flow channel (2 a);
the air conditioner further comprises an adapting air duct (4 a), and the second flow channels (2 b) of the subsections (21) are communicated through the adapting air duct (4 a).
3. The exhaust gas concentration regulating device according to claim 2, characterized in that the first flow channel (2 a) forms a first flow path, the second flow channel (2 b) of each subsection (21) and the transfer duct (4 a) in combination form a second flow path, the flow resistance of which is greater than the first flow path.
4. The exhaust gas concentration adjusting device according to claim 2, wherein the number of the switching air ducts (4 a) is more than two, and the heater (3) is provided in at least one switching air duct (4 a).
5. The exhaust gas concentration adjusting device according to claim 2, wherein the number of the subsections (21) is more than three, and the second flow passages (2 b) of two adjacent subsections (21) are connected through the switching air duct (4 a).
6. The exhaust gas concentration adjusting device according to claim 5, further comprising a cover body (4), wherein the cover body (4) covers one side of two adjacent subsections (21) in the extending direction of the second flow channel (2 b), and forms an adapting air channel (4 a) with the two adjacent subsections (21) in a surrounding manner.
7. The exhaust gas concentration regulating device according to any one of claims 1 to 6, characterized in that the second air duct (14) and the fourth air duct (16) are in communication.
8. The exhaust gas concentration adjusting apparatus according to any one of claims 1 to 6, wherein the on-off valve further includes valve means for controlling a communication state of the second air passage (14) and the inlet air passage (11), a communication state of the second air passage (14) and the outlet air passage (12), and a communication state of the first air passage (13) and the outlet air passage (12), respectively;
when the second air channel (14) is communicated with the inlet air channel (11), the second air channel (14) is isolated from the outlet air channel (12), the first air channel (13) is isolated from the inlet air channel (11), and the first air channel (13) is communicated with the outlet air channel (12).
9. The exhaust gas concentration regulating device according to claim 8, characterized in that the first air duct (13) communicates with the outlet air duct (12) through the fourth air duct (16), and the second air duct (14) communicates with the inlet air duct (11) through the third air duct (15).
10. The exhaust gas concentration adjusting apparatus according to claim 9, wherein the valve member includes a first poppet valve (5) and a second poppet valve (6);
the first lift valve (5) comprises a first valve rod (51) and a first valve plate (52) which are connected, the first valve plate (52) is arranged in the first air duct (13), and the first valve plate (52) is provided with a first working position and a second working position; in the first working position, the first air channel (13) is communicated with the inlet air channel (11), and the first air channel (13) is isolated from the fourth air channel (16); in the second working position, the first air channel (13) is isolated from the inlet air channel (11), and the first air channel (13) is communicated with the fourth air channel (16);
the second lifting valve (6) comprises a second valve rod (61) and a second valve plate (62) which are connected, the second valve plate (62) is arranged in the second air duct (14), and the second valve plate (62) is provided with a third working position and a fourth working position; in the third working position, the second air duct (14) is communicated with the third air duct (15), and the second air duct (14) is isolated from the outlet air duct (12); in the fourth working position, the second air duct (14) is isolated from the third air duct (15), and the second air duct (14) is communicated with the outlet air duct (12).
11. The exhaust gas concentration adjusting apparatus according to any one of claims 1 to 6, wherein the adsorbent (2) includes a plurality of substrates (211) arranged at intervals, an adsorption space is formed between two adjacent substrates (211), and a flow divider (212) is provided between two adjacent substrates (211) for partitioning the first flow passage (2 a) and the second flow passage (2 b) in the adsorption space.
12. The exhaust gas concentration adjusting apparatus according to claim 11, wherein one of the two adjacent adsorption spaces is formed with the first flow passage (2 a) and the other is formed with the second flow passage (2 b).
13. The exhaust gas concentration adjusting apparatus according to claim 11, wherein the flow dividing member (212) is a corrugated plate, a pipe member, or a plate member disposed at an angle to the base plate (211).
14. The exhaust gas concentration adjustment device according to claim 11, characterized in that the flow divider (212) is adhesively fixed to the base plate (211).
15. The exhaust gas concentration adjustment apparatus according to claim 11, wherein the material of the flow dividing member (212) and the substrate (211) is an organic substance adsorbing material.
16. The exhaust gas concentration adjusting apparatus according to claim 11, wherein the extending direction of the first flow passage (2 a) and the extending direction of the second flow passage (2 b) are disposed at an angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210669729.2A CN114950065B (en) | 2022-06-14 | 2022-06-14 | Waste gas concentration adjusting device |
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| CN202210669729.2A CN114950065B (en) | 2022-06-14 | 2022-06-14 | Waste gas concentration adjusting device |
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| CN114950065B true CN114950065B (en) | 2023-09-12 |
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| CN114950065A (en) | 2022-08-30 |
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